On Mon Feb 3, 2025 at 6:43 PM CET, Jens Reidel wrote: > The current implementation of the goodix_berlin driver lacks support for > revisions A and B of the Berlin IC. This change adds support for the > gt9897 IC, which is a Berlin-A revision part. > > The differences between revision D and A are rather minor, a handful of > address changes and a slightly larger read buffer. They were taken from > the driver published by Goodix, which does a few more things that don't > appear to be necessary for the touchscreen to work properly.
Thanks for sending this, works fine on Fairphone 5 on v6.14-rc1 kernel, after also applying these general fixes: https://lore.kernel.org/linux-input/20250103-goodix-berlin-fixes-v1-0-b014737b0...@fairphone.com/ Tested-by: Luca Weiss <luca.we...@fairphone.com> Regards Luca > > Signed-off-by: Jens Reidel <adr...@travitia.xyz> > --- > drivers/input/touchscreen/goodix_berlin.h | 9 ++++ > .../input/touchscreen/goodix_berlin_core.c | 27 +++++++++--- > drivers/input/touchscreen/goodix_berlin_i2c.c | 6 ++- > drivers/input/touchscreen/goodix_berlin_spi.c | 44 +++++++++++++++---- > 4 files changed, 72 insertions(+), 14 deletions(-) > > diff --git a/drivers/input/touchscreen/goodix_berlin.h > b/drivers/input/touchscreen/goodix_berlin.h > index 38b6f9ddbdef..a5232e58c166 100644 > --- a/drivers/input/touchscreen/goodix_berlin.h > +++ b/drivers/input/touchscreen/goodix_berlin.h > @@ -12,6 +12,15 @@ > > #include <linux/pm.h> > > +enum goodix_berlin_ic_type { > + IC_TYPE_BERLIN_A, > + IC_TYPE_BERLIN_D, > +}; > + > +struct goodix_berlin_ic_data { > + enum goodix_berlin_ic_type ic_type; > +}; > + > struct device; > struct input_id; > struct regmap; > diff --git a/drivers/input/touchscreen/goodix_berlin_core.c > b/drivers/input/touchscreen/goodix_berlin_core.c > index 3fc03cf0ca23..b892ab901d64 100644 > --- a/drivers/input/touchscreen/goodix_berlin_core.c > +++ b/drivers/input/touchscreen/goodix_berlin_core.c > @@ -12,7 +12,7 @@ > * to the previous generations. > * > * Currently the driver only handles Multitouch events with already > - * programmed firmware and "config" for "Revision D" Berlin IC. > + * programmed firmware and "config" for "Revision A/D" Berlin IC. > * > * Support is missing for: > * - ESD Management > @@ -20,7 +20,7 @@ > * - "Config" update/flashing > * - Stylus Events > * - Gesture Events > - * - Support for older revisions (A & B) > + * - Support for revision B > */ > > #include <linux/bitfield.h> > @@ -28,6 +28,7 @@ > #include <linux/input.h> > #include <linux/input/mt.h> > #include <linux/input/touchscreen.h> > +#include <linux/of.h> > #include <linux/regmap.h> > #include <linux/regulator/consumer.h> > #include <linux/sizes.h> > @@ -54,9 +55,11 @@ > #define GOODIX_BERLIN_DEV_CONFIRM_VAL 0xAA > #define GOODIX_BERLIN_BOOTOPTION_ADDR 0x10000 > #define GOODIX_BERLIN_FW_VERSION_INFO_ADDR 0x10014 > +#define GOODIX_BERLIN_FW_VERSION_INFO_ADDR_A 0x1000C > > #define GOODIX_BERLIN_IC_INFO_MAX_LEN SZ_1K > #define GOODIX_BERLIN_IC_INFO_ADDR 0x10070 > +#define GOODIX_BERLIN_IC_INFO_ADDR_A 0x10068 > > #define GOODIX_BERLIN_CHECKSUM_SIZE sizeof(u16) > > @@ -297,9 +300,16 @@ static void goodix_berlin_power_off(struct > goodix_berlin_core *cd) > > static int goodix_berlin_read_version(struct goodix_berlin_core *cd) > { > + const struct goodix_berlin_ic_data *ic_data = > of_device_get_match_data(cd->dev); > + int fw_version_info_addr; > int error; > > - error = regmap_raw_read(cd->regmap, GOODIX_BERLIN_FW_VERSION_INFO_ADDR, > + if (ic_data->ic_type == IC_TYPE_BERLIN_A) > + fw_version_info_addr = GOODIX_BERLIN_FW_VERSION_INFO_ADDR_A; > + else > + fw_version_info_addr = GOODIX_BERLIN_FW_VERSION_INFO_ADDR; > + > + error = regmap_raw_read(cd->regmap, fw_version_info_addr, > &cd->fw_version, sizeof(cd->fw_version)); > if (error) { > dev_err(cd->dev, "error reading fw version, %d\n", error); > @@ -358,16 +368,23 @@ static int goodix_berlin_parse_ic_info(struct > goodix_berlin_core *cd, > > static int goodix_berlin_get_ic_info(struct goodix_berlin_core *cd) > { > + const struct goodix_berlin_ic_data *ic_data = > of_device_get_match_data(cd->dev); > u8 *afe_data __free(kfree) = NULL; > __le16 length_raw; > u16 length; > + int ic_info_addr; > int error; > > + if (ic_data->ic_type == IC_TYPE_BERLIN_A) > + ic_info_addr = GOODIX_BERLIN_IC_INFO_ADDR_A; > + else > + ic_info_addr = GOODIX_BERLIN_IC_INFO_ADDR; > + > afe_data = kzalloc(GOODIX_BERLIN_IC_INFO_MAX_LEN, GFP_KERNEL); > if (!afe_data) > return -ENOMEM; > > - error = regmap_raw_read(cd->regmap, GOODIX_BERLIN_IC_INFO_ADDR, > + error = regmap_raw_read(cd->regmap, ic_info_addr, > &length_raw, sizeof(length_raw)); > if (error) { > dev_err(cd->dev, "failed get ic info length, %d\n", error); > @@ -380,7 +397,7 @@ static int goodix_berlin_get_ic_info(struct > goodix_berlin_core *cd) > return -EINVAL; > } > > - error = regmap_raw_read(cd->regmap, GOODIX_BERLIN_IC_INFO_ADDR, > + error = regmap_raw_read(cd->regmap, ic_info_addr, > afe_data, length); > if (error) { > dev_err(cd->dev, "failed get ic info data, %d\n", error); > diff --git a/drivers/input/touchscreen/goodix_berlin_i2c.c > b/drivers/input/touchscreen/goodix_berlin_i2c.c > index ad7a60d94338..b3fd063b4242 100644 > --- a/drivers/input/touchscreen/goodix_berlin_i2c.c > +++ b/drivers/input/touchscreen/goodix_berlin_i2c.c > @@ -53,8 +53,12 @@ static const struct i2c_device_id goodix_berlin_i2c_id[] = > { > > MODULE_DEVICE_TABLE(i2c, goodix_berlin_i2c_id); > > +static const struct goodix_berlin_ic_data gt9916_data = { > + .ic_type = IC_TYPE_BERLIN_D, > +}; > + > static const struct of_device_id goodix_berlin_i2c_of_match[] = { > - { .compatible = "goodix,gt9916", }, > + { .compatible = "goodix,gt9916", .data = >9916_data }, > { } > }; > MODULE_DEVICE_TABLE(of, goodix_berlin_i2c_of_match); > diff --git a/drivers/input/touchscreen/goodix_berlin_spi.c > b/drivers/input/touchscreen/goodix_berlin_spi.c > index 0662e87b8692..f48f11a76b6d 100644 > --- a/drivers/input/touchscreen/goodix_berlin_spi.c > +++ b/drivers/input/touchscreen/goodix_berlin_spi.c > @@ -10,6 +10,7 @@ > #include <linux/unaligned.h> > #include <linux/kernel.h> > #include <linux/module.h> > +#include <linux/of.h> > #include <linux/regmap.h> > #include <linux/spi/spi.h> > #include <linux/input.h> > @@ -19,9 +20,13 @@ > #define GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN 1 > #define GOODIX_BERLIN_REGISTER_WIDTH 4 > #define GOODIX_BERLIN_SPI_READ_DUMMY_LEN 3 > +#define GOODIX_BERLIN_SPI_READ_DUMMY_LEN_A 4 > #define GOODIX_BERLIN_SPI_READ_PREFIX_LEN > (GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \ > GOODIX_BERLIN_REGISTER_WIDTH + > \ > > GOODIX_BERLIN_SPI_READ_DUMMY_LEN) > +#define GOODIX_BERLIN_SPI_READ_PREFIX_LEN_A > (GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \ > + GOODIX_BERLIN_REGISTER_WIDTH + > \ > + > GOODIX_BERLIN_SPI_READ_DUMMY_LEN_A) > #define GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN > (GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \ > GOODIX_BERLIN_REGISTER_WIDTH) > > @@ -33,32 +38,41 @@ static int goodix_berlin_spi_read(void *context, const > void *reg_buf, > size_t val_size) > { > struct spi_device *spi = context; > + const struct goodix_berlin_ic_data *ic_data = > of_device_get_match_data(&spi->dev); > struct spi_transfer xfers; > struct spi_message spi_msg; > const u32 *reg = reg_buf; /* reg is stored as native u32 at start of > buffer */ > + ssize_t read_prefix_len, read_dummy_len; > int error; > > + if (ic_data->ic_type == IC_TYPE_BERLIN_A) { > + read_prefix_len = GOODIX_BERLIN_SPI_READ_PREFIX_LEN_A; > + read_dummy_len = GOODIX_BERLIN_SPI_READ_DUMMY_LEN_A; > + } else { > + read_prefix_len = GOODIX_BERLIN_SPI_READ_PREFIX_LEN; > + read_dummy_len = GOODIX_BERLIN_SPI_READ_DUMMY_LEN; > + } > + > if (reg_size != GOODIX_BERLIN_REGISTER_WIDTH) > return -EINVAL; > > u8 *buf __free(kfree) = > - kzalloc(GOODIX_BERLIN_SPI_READ_PREFIX_LEN + val_size, > - GFP_KERNEL); > + kzalloc(read_prefix_len + val_size, GFP_KERNEL); > if (!buf) > return -ENOMEM; > > spi_message_init(&spi_msg); > memset(&xfers, 0, sizeof(xfers)); > > - /* buffer format: 0xF1 + addr(4bytes) + dummy(3bytes) + data */ > + /* buffer format: 0xF1 + addr(4bytes) + dummy(3/4bytes) + data */ > buf[0] = GOODIX_BERLIN_SPI_READ_FLAG; > put_unaligned_be32(*reg, buf + GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN); > memset(buf + GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + > GOODIX_BERLIN_REGISTER_WIDTH, > - 0xff, GOODIX_BERLIN_SPI_READ_DUMMY_LEN); > + 0xff, read_dummy_len); > > xfers.tx_buf = buf; > xfers.rx_buf = buf; > - xfers.len = GOODIX_BERLIN_SPI_READ_PREFIX_LEN + val_size; > + xfers.len = read_prefix_len + val_size; > xfers.cs_change = 0; > spi_message_add_tail(&xfers, &spi_msg); > > @@ -68,7 +82,7 @@ static int goodix_berlin_spi_read(void *context, const void > *reg_buf, > return error; > } > > - memcpy(val_buf, buf + GOODIX_BERLIN_SPI_READ_PREFIX_LEN, val_size); > + memcpy(val_buf, buf + read_prefix_len, val_size); > return error; > } > > @@ -123,6 +137,7 @@ static const struct input_id goodix_berlin_spi_input_id = > { > > static int goodix_berlin_spi_probe(struct spi_device *spi) > { > + const struct goodix_berlin_ic_data *ic_data = > of_device_get_match_data(&spi->dev); > struct regmap_config regmap_config; > struct regmap *regmap; > size_t max_size; > @@ -137,7 +152,10 @@ static int goodix_berlin_spi_probe(struct spi_device > *spi) > max_size = spi_max_transfer_size(spi); > > regmap_config = goodix_berlin_spi_regmap_conf; > - regmap_config.max_raw_read = max_size - > GOODIX_BERLIN_SPI_READ_PREFIX_LEN; > + if (ic_data->ic_type == IC_TYPE_BERLIN_A) > + regmap_config.max_raw_read = max_size - > GOODIX_BERLIN_SPI_READ_PREFIX_LEN_A; > + else > + regmap_config.max_raw_read = max_size - > GOODIX_BERLIN_SPI_READ_PREFIX_LEN; > regmap_config.max_raw_write = max_size - > GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN; > > regmap = devm_regmap_init(&spi->dev, NULL, spi, ®map_config); > @@ -153,13 +171,23 @@ static int goodix_berlin_spi_probe(struct spi_device > *spi) > } > > static const struct spi_device_id goodix_berlin_spi_ids[] = { > + { "gt9897" }, > { "gt9916" }, > { }, > }; > MODULE_DEVICE_TABLE(spi, goodix_berlin_spi_ids); > > +static const struct goodix_berlin_ic_data gt9897_data = { > + .ic_type = IC_TYPE_BERLIN_A, > +}; > + > +static const struct goodix_berlin_ic_data gt9916_data = { > + .ic_type = IC_TYPE_BERLIN_D, > +}; > + > static const struct of_device_id goodix_berlin_spi_of_match[] = { > - { .compatible = "goodix,gt9916", }, > + { .compatible = "goodix,gt9897", .data = >9897_data }, > + { .compatible = "goodix,gt9916", .data = >9916_data }, > { } > }; > MODULE_DEVICE_TABLE(of, goodix_berlin_spi_of_match);
